/**
 * 
 */
package Servlet;

import Control.CCache;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;

/**
 *获取所有房屋信息： 必要参数：起始条数 start 终结条数 end
 * @author Administrator
 */
public class HouseInfoAll extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            Map map = request.getParameterMap();
            if (map.containsKey("start") && map.containsKey("end")) {
                String Start = request.getParameter("start");
                String End = request.getParameter("end");
                int start = Integer.parseInt(Start);
                int end = Integer.parseInt(End);
                if (start >= end) {
                    out.write("Error");

                } else {
                    CCache cache = CCache.getCache();
                    HashMap HouseMap = cache.getHouseMap();
                    JSONArray json = JSONArray.fromObject(HouseMap.values());
                    for (int i = start; i <= end; i++) {
                        out.print(json.getJSONObject(i));
                    }
                }
            } else {
                CCache cache = CCache.getCache();
                HashMap HouseMap = cache.getHouseMap();
                JSONArray json = JSONArray.fromObject(HouseMap.values());
                out.write(json.toString());
            }
        }
        finally {
            out.close();
    }
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
 * Handles the HTTP
 * <code>GET</code> method.
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
@Override
        protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
        protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
        public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
